Definition: Metapleuron is a term used in the field of music theory, specifically related to the relationship between musical forms and their underlying structure. It refers to the idea that certain musical structures or forms can be seen as more abstract or symbolic than others, which means they may not have a clear meaning or purpose on their own. Metapleuron is often associated with the concept of "metaphors," which are non-representational representations of music that do not necessarily correspond to specific notes or